|Subject:||Re: LF: EbNaut and The Cat / Take 3|
|From:||Markus Vester <[email protected]>|
|Date:||Wed, 25 Nov 2015 12:09:20 -0500|
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Signal got better later, and is still visible as a blue haze in last night's TA spectrograms https://dl.dropboxusercontent.com/u/26404526/LF_old/LF_lastnight.htm .
All messages up to 2 UT decoded nicely:
start Eb/N0 time offset
UT dB seconds
2100 10.3 1.1
2200 7.2 3.5
2230 8.8 4.5
2300 11.1 5.8
2330 11.2 7.0
0000 13.9 8.1
0030 8.0 9.6
0100 8.1 11.1
0130 11.6 12.0
The time offset is only approximate, and I'm not sure whether the first second is due to a lag associated with low decimated samplerate. But the average rate of delay accumulation (1.2s / 30min) is probably correct.
Thanks to Paul for of ebnaut-rx version 0.3d. I also think that counting all missing symbols as errors will be too pessimistic. Maybe it makes sense to assume a 50% error rate for the statistics, more equivalent to a loss of signal e.g. due to propagation.
One very minor issue I noticed with the previous version is that it crashes when rerunning after having increased the message length - presumably some buffer becoming too small.
Thanks also from here to all participants (feline and human)! Next step - reduce frequency by 24.4334 dB?
Von: Paul Nicholson <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mi, 25 Nov 2015 3:57 pm
Betreff: Re: LF: EbNaut and The Cat / Take 3
Thanks to all for the interesting tests. But we are battling
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